Rival 710 vs Rival 600?

[Vidar]

I need a new mouse and am a fan of Steel series products. What I need to know is if the 710 is worth the price premium over the 600.

House bound so can't get out to test them so want to be sure about what I get.

 

[Vidar]

Good price on the 650 but don't need wireless, are there any improvements other than that between the 600 and 650?

Just want a reduction on the 710 by £20 or so and I'm all over it, much prefer the look to the 600.

 

[Vidar]

Bought the 600 as I also had to buy a new baby monitor, also couldn't really find any reviews of the 710 and don't really need the screen or feedback in some games, while for the 600 the only negative people mention is the dpi switch and that it's heavier than some of its competitors.